MesoWest Information for MASW in Manson, WA, United States Of America (site inactive)

The following information is known about MASW. If you think that any information is incorrect, then please follow the instructions for correcting that data item.

It is possible that this page will report a problem where no problem exists. If you believe that this has happened, then please contact me (address at the bottom of this page) and explain clearly why you think this page is in error. Note that any changes that you make may take a few days to show up here, so please give it a week before commenting.

For development purposes only
Sorry, we have no imagery here.
For development purposes only
Sorry, we have no imagery here.
For development purposes only
Sorry, we have no imagery here.
For development purposes only
Sorry, we have no imagery here.
MASW
GW3558
DW7264
WA7CUG
EW6379
EW1392
GW0787
EW8522
EW7146
DW8546
EW5752
DW6267
FW4618
FW5403
EW2755
FW6772
DW7538
GW3555
EW2072
CW6697
GW3556
FW4132
DW8222
GW4132
GW2674
CW0750
GW2673
EW1026
WD6CGF
DW8374
K7RMR
DW9633
EW3732
EW4750
KE7OZA
FW8309
FW6102
DW9732
W7MB
EW7771
FW9289
DW4827
CW5316
FW9546
DW1541
FW9074
CW7091
DW9722
FW4716
FW8547
KK7UNF
DW0372
EW6089
EW1994
N4VTB-13
FW7582
CW9546
KE7PGE-13
FW7737
EW6774
EW1958
N9EX
KD7TTL
DW2629
GW4795
GW2704
EW9714
EW4205
EW8450
GW5739
CW1661
CW6302
EW4100
GW3348
GW4678
FW8450
BALDI
GW2645
DW2690
GW2646
EW6690
FW2406
N7JMV
KK7GO-7
FW2477
EW4092
W7GPL
DW6241
GW1372
CW6871
EW6986
EW1269
GW3788
DW7465
GW3540
EW8474
DW7537
CW2659
CW5022
FW8324
AC7PD
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Registered Location

Latitude: 47° 55' 1" N (deg min sec), 47.9169° (decimal), 4755.02N (LORAN)
Longitude: 120° 7' 28" W (deg min sec), -120.1244° (decimal), 12007.46W (LORAN)
Elevation: 601 metres (1972 feet) -- validated against 608 metres (1994 feet) from NED 1/3rd arc-second: Western United States
Location: Manson, WA, United States Of America
County: Chelan, WA
Data provider: AGRIMET
Forecast Office: Spokane (OTX)

The site location should be at the mark shown -- or very close. Clicking within the map area (or you can drag the 'MASW' marker) will display the latitude/longitude of that point.

If the displayed location (or elevation) of the weather observing location is incorrect, please drag the marker to the right location (or click in the right location), and then send the updated information. Please note that we are trying to spot either the Stevenson Screen (or equivalent) or the location where the barometric readings are taken.

Can you help with location quality? Please indicate if the marker on the map points at the weather instrument cluster:

The location information for this site was gathered from 1 data source. The source which most closely matches the consensus is chosen. Many of these sources only report the location to the nearest minute (or hundredth of degree). This can lead to the marker being placed noticeably incorrectly. Please see Discussion of Location Errors for more information. Show location history.

There are no photographs of the station. If you have pictures of this location, then please email them to masw@photo.gladstonefamily.net.

You can try to find photographs from the area surrounding the site marker by clicking on Find nearby photographs. (There are none)

Data Status

Over the last 28 days, no data was seen on the following dates: 2025-02-19 to 2025-02-20, 2025-03-03 to 2025-03-17.

Recent observations from this weather station can be downloaded as a CSV file suitable for importing into various spreadsheet programs: last 7 days, last 14 days, last 28 days, last 56 days. This data can also be linked directly from Excel using a Web Query. The main link goes to the page with the data on it, and the IQY link is the Web Query that will access it: last 7 days (IQY: last 7 days), last 14 days (IQY: last 14 days), last 28 days (IQY: last 28 days), last 56 days (IQY: last 56 days).

All the means and standard deviations shown below are from the last 28 days. Change analysis period to Last 3 days  Last 7 days  Last 14 days  Last 8 weeks  Last 13 weeks  Last 26 weeks  Last 39 weeks  Last 52 weeks  

Temperature

  24 hours  Day time  Night time
Average temperature error0.8 °F-0.2 °F1.4 °F
Error standard deviation2.0 °F1.5 °F2.1 °F

NOTE: If the error above is POSITIVE, then it means that the analysis temperature is HIGHER than the reported temperature. This means that your sensor is reading COLDER than expected.

 
 
MADIS
rating
MADIS rating 100% QC OK
 

Latest daily graph:

Latest daily graph

These values are within the acceptable range. This probably means that your sensor is sited correctly and is calibrated correctly.

Dewpoint -- or switch to Relative Humidity

  24 hours  Day time  Night time
Average dewpoint error0.1 °F-0.2 °F0.2 °F
Error standard deviation1.5 °F1.2 °F1.7 °F

NOTE: If the error above is POSITIVE, then it means that the analysis temperature is HIGHER than the reported temperature. This means that your sensor is reading COLDER than expected.

 
 
MADIS
rating
MADIS rating 100% QC OK
 

Latest daily graph:

Latest daily graph

These values are within the acceptable range. This probably means that your sensor is sited correctly and is calibrated correctly.

Wind Vector

The wind vector is the average wind over the relevant period. Note that if the wind blows North for half the time at 2 knots, and then blows South for the other half of the time at 2 knots, then the result is zero -- i.e. North wind and South wind will cancel out. Over time, the direction of the wind and of the analysis should match pretty well. If the lengths of the vector are different, then it could mean either that your anemometer reads high or low, or that you are in a more shielded or more open space.
MADIS
rating
MADIS rating 100% QC OK
TodayLast 7 days
Wind vector chartWind vector chart for last 7 days

Neighboring Stations

This is a list of stations that are close to this station. Note that this is not the list of stations that are used in the data analysis. That list of stations is known only to MADIS. You can see all the stations at MADIS Data Display. Your station should be in the middle of the display. If you think that the analysis is incorrect, then maybe one of the close stations has failed.

You can look at those for comparison purposes. The average difference between your station and each station below is listed as well. This may allow you to detect local stations which are erroneous. You can also use these numbers to adjust your instruments -- especially if a number of ASOS stations have similar differences to your station. Also, try increasing the analysis period to more than the default 28 days. The difference is only given if both stations report reasonably often during each day. Some stations only report every 6 hours, and this makes the average of less interest. In this case, the average is not displayed. The values reported are the differences between this station and the neighboring station. I.e. if the difference is positive, then this station is reading higher than the neighboring station. Since this station has not been reporting continuously during the analysis period (it missed 17 days out of 28), the offsets below may not be accurate.

You can also subscribe to an RSS feed to tell you when new stations come online in this area. Choose either within 100 miles or 250 miles . For stations covered by your Forecast Office: Spokane (OTX) .

SiteDistanceLocationBarometerTemperatureDewpoint
DW726417.4 milesSouthwest Entiat, WA, US (lat 47.7023°, long -120.3218°, altitude 317 metres) 3.5°F0.3°F
WA7CUG22.2 milesEast BRIDGEPORT, WA, US (lat 47.9967°, long -119.6612°, altitude 298 metres) 2.4°F0.0°F
EW139225.3 milesWest Plain, WA, US (lat 47.8062°, long -120.6445°, altitude 607 metres) 2.9°F1.3°F
EW575234.4 milesSouthwest Leavenworth, WA, US (lat 47.5647°, long -120.6452°, altitude 613 metres) 0.5°F0.3°F
FW540336.4 milesSouth Wenatchee, WA, US (lat 47.4107°, long -120.3400°, altitude 288 metres) -0.6°F-0.6°F
EW275536.7 milesSouth Wenatchee, WA, US (lat 47.4025°, long -120.3205°, altitude 281 metres) 2.2°F1.1°F
FW677239.4 milesNorth Winthrop, WA, US (lat 48.4850°, long -120.1743°, altitude 641 metres) 1.1°F3.5°F
CW669747.7 milesNorth Winthrop, WA, US (lat 48.5823°, long -120.4007°, altitude 639 metres) 3.6°F3.2°F
GW355648.8 milesNorth WINTHROP, WA, US (lat 48.6230°, long -120.1052°, altitude 1674 metres) -10.2°F10.9°F
DW837465.9 milesSouth Ellensburg, WA, US (lat 47.0057°, long -120.5370°, altitude 488 metres) -0.3°F-0.5°F

Quality Control Notes

This page reports on the quality control checks performed by MADIS. The green check mark and red cross are chosen based on the average performance during the analysis period (which is selectable above). The red cross can appear even if MADIS reports that all observations pass the MADIS QC checks.

The 'MADIS rating' reports on the percentage of observations that pass the MADIS checks. You should aim for two thumbs up!

Location Formats

The location is shown in three different formats. Each of these is used in some software, and is shown on some websites.

Degrees Minutes Seconds: VWS/VWSAPRS, WeatherLink 5.5, WeatherLink (5.2-5.4), WeatherView (Linux)

Decimal degrees: FreeWX, WeatherView32 (PC application)

LORAN: WeatherDisplay, WUHU, Henriksen WServer

Resources

CWOP Home: This describes the whole CWOP program and has a large amount of useful information.

CWOP Siting Guide (PDF): This is a guide to siting and operating a CWOP station. This is a must-read document.

Another CWOP Guide (PDF): This is another guide to siting and operating a CWOP station. This is a must-read document.

Urban Siting and Operations (PDF): This is a guide to siting and operating a CWOP station in an urban environment.

APRS WX Message format: This describes the actual format of the messages transmitted that carry WX information.

WXQC Mailing List: This is a mailing list where data quality issues are discussed. Assistance with software configuration can often be found here.

Topo Map Reading Guide: How to read USGS topographic maps, with a good section on reading contours.

Geographically nearby web pages: Use Geourl to find web pages that deal with locations geographically close to this site.


Overall website comments, problems etc to Philip Gladstone
Page layout last modified Sunday, 28 February 2016
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